imageSwitcher控件用法

xml代码：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.imageswitcher.MainActivity$PlaceholderFragment" >

<ImageSwitcher
android:id="@+id/imageSwitcher1"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignLeft="@+id/button1"
android:layout_alignParentTop="true"
android:layout_marginLeft="38dp"
android:layout_marginTop="61dp" >
</ImageSwitcher>

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/imageSwitcher1"
android:layout_marginLeft="53dp"
android:layout_marginTop="69dp"
android:text="next" />

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="53dp"
android:layout_marginTop="69dp"
android:layout_alignBaseline="@+id/button1"
android:layout_alignBottom="@+id/button1"
android:layout_toRightOf="@id/button1"
android:text="before" />

</RelativeLayout>

java代码：
package com.example.imageswitcher;

import java.util.ArrayList;

import java.util.List;

import android.graphics.drawable.Drawable;

import android.os.Bundle;

import android.support.v7.app.ActionBarActivity;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageSwitcher;

import android.widget.ImageView;

import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends ActionBarActivity implements OnClickListener,ViewFactory{
private Button button1,button2;
private ImageSwitcher imageSwitcher;
private List<Drawable> list=new ArrayList<Drawable>();
private int index=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
button1=(Button) findViewById(R.id.button1);
button2=(Button) findViewById(R.id.button2);
imageSwitcher=(ImageSwitcher) findViewById(R.id.imageSwitcher1);

button1.setOnClickListener(this);
button2.setOnClickListener(this);
imageSwitcher.setFactory(this);
list.add(getResources().getDrawable(R.drawable.item1));
list.add(getResources().getDrawable(R.drawable.item2));
list.add(getResources().getDrawable(R.drawable.item3));
list.add(getResources().getDrawable(R.drawable.item4));
list.add(getResources().getDrawable(R.drawable.item5));
list.add(getResources().getDrawable(R.drawable.item6));
list.add(getResources().getDrawable(R.drawable.item7));
list.add(getResources().getDrawable(R.drawable.item8));
if (list.size()>0) {
imageSwitcher.setImageDrawable(list.get(0));
}
}
@Override
public View makeView() {
// TODO Auto-generated method stub
return new ImageView(MainActivity.this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
index++;
if (index>=list.size()) {
index=0;
}
imageSwitcher.setImageDrawable(list.get(index));

break;

case R.id.button2:
index--;
if (index<0) {
index=list.size()-1;
}
imageSwitcher.setImageDrawable(list.get(index));
break;
}

}

}